HOME >> BIOLOGY >> NEWS
DNA evidence suggests 3 types of elephants roam Africa

orphologically "indeterminate," or having both forest and savanna forms.

Their geographic isolation may have been caused by the desertification of a region in west Africa called the Dahomey Gap that separated the forests in central Africa from the forests in west Africa. Other potential barriers between the two regions include the Niger River Delta and the volcanic region of southwestern Cameroon. Based on their genetic data, the UCSD biologists believe that the west African populations have been isolated for as long as 2.4 million years.

The UCSD scientists note in their paper that while their genetic analyses of the mitochondrial, or maternally inherited, DNA sequences and nuclear microsatellite loci (short repetitive segments of DNA that show differences among populations and individuals) suggest the existence of "three recognizable taxa of African elephants," their results need to be confirmed before a formal taxonomic revision of the African elephants is proposed. That confirmation would require examination of additional nuclear DNA sequences which are inherited paternally as well as maternally.

"If the level of genetic differentiation between the three taxa identified here is confirmed to reflect several million years of divergence, it will be appropriate to treat them as species in recognition of their long independent evolutionary trajectories," they write in their paper.

Because nearly all of the African elephants in zoos are savanna elephants, the results do not have implications for elephants now in captivity. Zoos do not have forest elephants, largely because they are so elusive, and only three western elephants are now in captivity at the Abidjan Zoo in Cte d'Ivoire. However, the results have widespread implications for the management of all three types of wild African elephants. Although the ivory trade ban has slowed the slaughter of elephants, some countries have appealed for permission to resume the harvest.

"Only the sav
'"/>

Contact: Kim Mcdonald
kimmcdonald@ucsd.edu
858-534-7572
University of California - San Diego
12-Sep-2002


Page: 1 2 3 4

Related biology news :

1. New evidence of radiation risk in childhood leukaemia
2. Oldest evidence for processing of wild cereals: starch grains from barley, wheat, on grinding stone
3. Earliest evidence of hereditary genetic disorder discovered by Hebrew University researchers
4. Study finds first evidence COX-2 enzymes can regulate DNA damage
5. Researchers find evidence that sea turtles navigate with magnetic maps
6. Researchers report definitive evidence that HIV-AIDS is not from oral polio vaccine
7. Oldest known evidence of cat taming found in Cyprus, researchers report in Science
8. More evidence of major global extinctions
9. New evidence points to pollution as main cause of much coral reef destruction
10. New evidence suggests that monkey thought extinct still exists
11. Earliest evidence of humans affecting aquatic ecology in Canada, United States

Post Your Comments:
*Name:
*Comment:
*Email:


(Date:6/2/2016)... , June 2, 2016   The Weather Company ... announcing Watson Ads, an industry-first capability in which consumers will ... being able to ask questions via voice or text and ... Marketers have long sought an ... consumer, that can be personal, relevant and valuable; and can ...
(Date:6/1/2016)... NEW YORK , June 1, 2016 ... Biometric Technology in Election Administration and Criminal Identification to ... According to a recently released TechSci Research report, " ... Sector, By Region, Competition Forecast and Opportunities, 2011 - ... $ 24.8 billion by 2021, on account of growing ...
(Date:5/20/2016)... 20, 2016  VoiceIt is excited to announce ... By working together, VoiceIt and VoicePass ... and VoicePass take slightly different approaches to voice ... security and usability. ... new partnership. "This marketing and technology ...
Breaking Biology News(10 mins):
(Date:6/27/2016)... 27, 2016  Sequenom, Inc. (NASDAQ: SQNM ... lives through the development of innovative products and services, ... the United States denied its petition to ... of Sequenom,s U.S. Patent No. 6,258,540 (",540 Patent") are ... by the Supreme Court,s Mayo Collaborative Services v. Prometheus ...
(Date:6/27/2016)... 27, 2016  Liquid Biotech USA ... of a Sponsored Research Agreement with The University ... (CTCs) from cancer patients.  The funding will be ... correlate with clinical outcomes in cancer patients undergoing ... then be employed to support the design of ...
(Date:6/24/2016)... ... 24, 2016 , ... Researchers at the Universita Politecnica delle Marche in Ancona ... or pleural mesothelioma. Their findings are the subject of a new article on the ... are signposts in the blood, lung fluid or tissue of mesothelioma patients that can ...
(Date:6/23/2016)... 2016 A person commits a crime, and the ... track the criminal down. An outbreak of foodborne ... Administration (FDA) uses DNA evidence to track down the bacteria ... far-fetched? It,s not. The FDA has increasingly used a complex, ... foodborne illnesses. Put as simply as possible, whole genome sequencing ...
Breaking Biology Technology:
Cached News: